[INFO] cloning repository https://github.com/shuttle-hq/awesome-shuttle
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/shuttle-hq/awesome-shuttle" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshuttle-hq%2Fawesome-shuttle", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshuttle-hq%2Fawesome-shuttle'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5c52b6da395afd045ac57bdaa15710dd23b01ee1
[INFO] checking shuttle-hq/awesome-shuttle against master#af4a5a13a15fa0c60e06321077ef452f769b42fd for pr-122960-4
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshuttle-hq%2Fawesome-shuttle" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/shuttle-hq/awesome-shuttle on toolchain af4a5a13a15fa0c60e06321077ef452f769b42fd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/shuttle-hq/awesome-shuttle
[INFO] finished tweaking git repo https://github.com/shuttle-hq/awesome-shuttle
[INFO] tweaked toml for git repo https://github.com/shuttle-hq/awesome-shuttle written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/shuttle-hq/awesome-shuttle already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded scraper v0.12.0
[INFO] [stderr]   Downloaded cssparser-macros v0.6.0
[INFO] [stderr]   Downloaded string_cache v0.8.3
[INFO] [stderr]   Downloaded http-body v0.4.1
[INFO] [stderr]   Downloaded diffy v0.3.0
[INFO] [stderr]   Downloaded chrono-humanize v0.2.1
[INFO] [stderr]   Downloaded rustc-demangle v0.1.19
[INFO] [stderr]   Downloaded httpdate v1.0.0
[INFO] [stderr]   Downloaded dtoa-short v0.3.3
[INFO] [stderr]   Downloaded backtrace v0.3.58
[INFO] [stderr]   Downloaded reqwest v0.11.3
[INFO] [stderr]   Downloaded h2 v0.3.17
[INFO] [stderr]   Downloaded tokio v1.8.4
[INFO] [stderr]   Downloaded tendril v0.4.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cea749b3e284ea16835d9cb409955286a75cd001d4a04d0c223d5bc459a08fb4
[INFO] running `Command { std: "docker" "start" "-a" "cea749b3e284ea16835d9cb409955286a75cd001d4a04d0c223d5bc459a08fb4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cea749b3e284ea16835d9cb409955286a75cd001d4a04d0c223d5bc459a08fb4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cea749b3e284ea16835d9cb409955286a75cd001d4a04d0c223d5bc459a08fb4", kill_on_drop: false }`
[INFO] [stdout] cea749b3e284ea16835d9cb409955286a75cd001d4a04d0c223d5bc459a08fb4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=allow" "-e" "RUSTDOCFLAGS=--cap-lints=allow" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 272f50c524d0f7c53e6177918f2cc0f6bde0a0add4dc462bb0ab379685b0a9b4
[INFO] running `Command { std: "docker" "start" "-a" "272f50c524d0f7c53e6177918f2cc0f6bde0a0add4dc462bb0ab379685b0a9b4", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.119
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]    Compiling unicode-ident v1.0.8
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling siphasher v0.3.9
[INFO] [stderr]    Compiling cc v1.0.67
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]    Compiling proc-macro-nested v0.1.7
[INFO] [stderr]     Checking futures-sink v0.3.14
[INFO] [stderr]     Checking futures-core v0.3.14
[INFO] [stderr]    Compiling tokio v1.8.4
[INFO] [stderr]     Checking once_cell v1.7.2
[INFO] [stderr]     Checking futures-task v0.3.14
[INFO] [stderr]     Checking futures-io v0.3.14
[INFO] [stderr]     Checking futures-channel v0.3.14
[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]     Checking new_debug_unreachable v1.0.4
[INFO] [stderr]     Checking precomputed-hash v0.1.1
[INFO] [stderr]     Checking dtoa v0.4.8
[INFO] [stderr]     Checking mac v0.1.1
[INFO] [stderr]     Checking phf_shared v0.10.0
[INFO] [stderr]     Checking utf-8 v0.7.6
[INFO] [stderr]     Checking futf v0.1.4
[INFO] [stderr]     Checking unicode-normalization v0.1.17
[INFO] [stderr]     Checking httparse v1.7.1
[INFO] [stderr]     Checking http-body v0.4.1
[INFO] [stderr]     Checking httpdate v1.0.0
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking gimli v0.23.0
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking dtoa-short v0.3.3
[INFO] [stderr]     Checking tendril v0.4.2
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]     Checking rustc-demangle v0.1.19
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking servo_arc v0.1.1
[INFO] [stderr]     Checking thin-slice v0.1.1
[INFO] [stderr]    Compiling pulldown-cmark v0.8.0
[INFO] [stderr]     Checking object v0.23.0
[INFO] [stderr]     Checking linked-hash-map v0.5.4
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.56/src/lib.rs:92:30
[INFO] [stdout]    |
[INFO] [stdout] 92 |     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking regex v1.5.5
[INFO] [stderr]     Checking ipnet v2.3.0
[INFO] [stderr]     Checking ego-tree v0.6.2
[INFO] [stderr]     Checking diffy v0.3.0
[INFO] [stderr]     Checking yaml-rust v0.4.5
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `proc-macro2` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "272f50c524d0f7c53e6177918f2cc0f6bde0a0add4dc462bb0ab379685b0a9b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "272f50c524d0f7c53e6177918f2cc0f6bde0a0add4dc462bb0ab379685b0a9b4", kill_on_drop: false }`
[INFO] [stdout] 272f50c524d0f7c53e6177918f2cc0f6bde0a0add4dc462bb0ab379685b0a9b4